The formal act of severing diplomatic relations with another nation to underscore disapproval of its actions or policies. It is only done under severe situations. 

·         C  

Chancery 

The office space where the Chief of Mission and his staff work. This office is sometimes called the embassy, but, technically, the embassy refers to the diplomatic delegation itself. 

·         Chargé d'affaires 

Formerly, a chargé d'affaires was the title of a chief of mission, inferior in rank to an ambassador or a minister. It is still used as the title of the head of a US mission where the US and other nation do not have full diplomatic relations. Today with the a.i. (ad interim) added, it designates the senior officer taking charge for the interval when a chief of mission is absent from his/her post or the position is vacant. 

·         Chief of Mission 

Usually called an ambassador, this is the ranking officer in an embassy or permanent mission and the personal representative of the head of state of his/her nation. 

·         Communiqué 

A brief public summary statement issued following important bilateral or multilateral meetings. 

·         Conciliation